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Antecedentes: la clase II (CII) esqueletica, en conjunto con un patron horario de crecimiento, puede predisponer anatomicamente a una via aerea superior mas estrecha. Objetivo: determinar si, segun la etiologia de la CII esqueletica (maxilar, mandibular, mixta o mixta en retroposicion), en pacientes con tendencia horaria de crecimiento, se observan caracteristicas particulares en el diametro de la via aerea. Metodos: este estudio descriptivo de corte transversal contempla la obtencion de 301 telerradiografias de perfil digitales de pacientes en crecimiento, de ambos sexos, que poseen un diagnostico de CII esqueletica con tendencia horaria. Se analizo el diametro faringeo en sus tres niveles (VAP-A, VAP-Mx1, VAP-B), la longitud del paladar blando y la distancia del hioides al plano mandibular. Se realizo un cuestionario de calidad de vida de los sujetos. Los analisis estadisticos utilizados fueron: Anova post-Hok Tukey, T-test, chi cuadrado y test de Fisher. Resultados: el diametro laringofaringeo (VAP-B) en las 4 etiologias (p = 0,001) se encuentra disminuido respecto a la norma; los ninos presentan un paladar blando de mayor longitud que las ninas (p = 0,018); y un 22 % de la muestra con etiologia mandibular reporta apnea. Conclusiones: no se observan caracteristicas particulares en el diametro de la via aerea en los distintos grupos estudiados. Todos presentaron un deficit laringofaringeo con respecto a la norma, asi como una deficiencia en la calidad de vida. El grupo con etiologia mandibular es el unico que reporta eventos de apnea durante el sueno.  Background: Skeletal Class II (CII) combined with a clockwise growth pattern can anatomically predispose to a narrow upper airway. Purpose: To establish if according to the skeletal CII etiology (mandibular, maxillary, mixed, or backwards mixed position) in cases with a clockwise growth tendency is possible to observe special characteristics on the airway diameter. Methods: This cross-sectional study used 301 lateral tele-cephalograms of growing skeletal CII with clockwise tendency patients of both sexes. Analysis included pharyngeal diameter in three levels (VAP-A VAP-Mx1, VAP-B), soft palate length, and hyoid-mandibular plane distance. Patients also responded a questionnaire about quality of life. Data were analyzed through ANOVA, post-Hok Tukey, T, Square Chi, and the Fisher’s tests. Results: Significant differences were found for the laryngeal-pharyngeal diameter (VAP-B) in the 4 etiologies (p=0.001) according to the standard; male children showed a longer soft palate when compared with females (p=0.018); and 22% with mandibular etiology presented apnea. Conclusions: No special characteristics were observed in the airway of the different groups of the study. All groups had a deficit at the laryngeal-pharyngeal level as well as a quality of life deficiency. The group with mandibular etiology is the only one that reported sleep apnea.

universitas odontológica

Análisis de la vía aérea mediante telerradiografía de perfil en clase II esquelética con tendencia horaria de crecimiento / Airway Cephalometric Analysis of Skeletal Class II with Clockwise Growth Tendency